Oceniono na 5 z 5 możliwych gwiazdek

The AddOn works like expected (with Thunderbird 38.4.0 at the moment). The feature request from David.P is implemented as an option - also per folder, which is just the right thing:
Ignore From account on Reply or Reply (let Thunderbird choose)

Ta opinia jest o wcześniejszej wersji dodatku (6.0).